import requests

from operator import itemgetter

# 执行API调用并存储响应
url = 'https://hacker-news.firebaseio.com/v0/topstories.json'
r = requests.get(url)
print("Status code:", r.status_code)
# 处理有关每篇文章的信息
submission_ids = r.json()
submission_dicts = []
for submission_id in submission_ids[:30]:
    # 对于每篇文章，都执行一个API调用
    url = ('https://hacker-news.firebaseio.com/v0/item/' +
           str(submission_id) + '.json')
submission_r = requests.get(url)
print(submission_r.status_code)
response_dict = submission_r.json()
submission_dict = {
    'title': response_dict['title'],
    'link': 'http://news.ycombinator.com/item?id=' + str(submission_id),
    'comments': response_dict.get('descendants', 0)
}
submission_dicts.append(submission_dict)
# 排序
submission_dicts = sorted(submission_dicts, key=itemgetter('comments'),
                          reverse=True)
for submission_dict in submission_dicts:
    # 每次多一个行
    print("\nTitle:", submission_dict['title'])
    print("Discussion link:", submission_dict['link'])
    print("Comments:", submission_dict['comments'])
